/*******************************************************************************
* Copyright 2007-2013 See AUTHORS file.
 * 
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package xworker.function.actions;

import org.xmeta.ActionContext;
import org.xmeta.Thing;
import org.xmeta.util.UtilString;

import xworker.function.ui.function.FunctionParameter;

public class ParameterValidates {
	public static String notNull(ActionContext actionContext){
		Thing self = (Thing) actionContext.get("self");
		
		FunctionParameter param = (FunctionParameter) actionContext.get("param");
		if(param.getValue() == null || "".equals(param.getValue())){
			return UtilString.getString(self.getString("message"), actionContext);
		}else{
			return null;
		}
	}
}